Function print_error

fftools/cmdutils.h:472–475

* Print an error message to stderr, indicating filename and a human * readable description of the error code err. * * If strerror_r() is not available the use of this function in a * multithreaded application may be unsafe. * * @see av_strerror() */

 * @see av_strerror()
 */
static inline void print_error(const char *filename, int err)
{
    av_log(NULL, AV_LOG_ERROR, "%s: %s\n", filename, av_err2str(err));
}

/**
 * Print the program banner to stderr. The banner contents depend on the